Life Sciences Commons^™

Spiranthes Lacera Var. Gracilis (Bigelow) Luer, Gordon C. Tucker

Specimens by Name

No abstract provided.

13th Biennial Cheese Industry Conference, Various Authors

Cheese Industry Conference

No abstract provided.

Characterization Of Metal-Regulated Genes In Pseudomonas Fluorescens, Melanie Pearson

Honors Theses

One side effect of today's industrialized world is increased levels of heavy metals in the environment. Many of these metals are necessary for biological function as trace elements, but at higher concentrations are toxic. Other metals, such as cadmium, are not beneficial at any level, and have only deleterious effects on living organisms. Cadmium is primarily thought to interfere with normal biological function of proteins. Human exposure to cadmium appears to primarily damage the kidneys, but may also affect the liver, lungs, immune system, and central nervous system. Bacteria, however, have developed several methods for handling toxic heavy metals: cation …

Verbena Hastata L., Gordon C. Tucker, Edwin H. Horning

Specimens by Name

No abstract provided.

Acer Palmatum Thunb., Gordon C. Tucker, Edwin H. Horning

Specimens by Name

No abstract provided.

Identification Of Putative Cytoskeletal Protein Homologues In The Protozoan Host Hartmannella Vermiformis As Substrates For Induced Tyrosine Phosphatase Activity Upon Attachment To The Legionnaires' Disease Bacterium, Legionella Pneumophila, Chandrasekar Venkataraman, Lian-Yang Gao, Subbarao Bondada, Yousef Abu Kwaik

Microbiology, Immunology, and Molecular Genetics Faculty Publications

The Legionnaires' disease bacterium, Legionella pneumophila, is a facultative intracellular pathogen that invades and replicates within two evolutionarily distant hosts, free living protozoa and mammalian cells. Invasion and intracellular replication within protozoa are thought to be major factors in the transmission of Legionnaires' disease. We have recently reported the identification of a galactose/N-acetyl-d-galactosamine (Gal/GalNAc) lectin in the protozoan host Hartmannella vermiformis as a receptor for attachment and invasion by L. pneumophila (Venkataraman, C., B.J. Haack, S. Bondada, and Y.A. Kwaik. 1997. J. Exp. Med. 186:537–547). In this report, we extended our studies to the …

Legume Logic Number 96

Legume Logic

Contents

Agronomy - growing for a greener future

Pulse points

Aphid damage to lupins - Francoise berlandier, AgWA

Winter pulse plantings for 1998 ('000 hectares)

Albus and anthracnose fungus - Bill O'Neill AgWa, Geraldton

Geostatistical Characterization Of The Spatial Distribution Of Adult Corn Rootworm (Coleoptera: Chrysomelidae) Emergence, M. M. Ellsbury, W. D. Woodson, S. A. Clay, D. D. Malo, J. Schumacher, D. Clay, C. G. Carlson

Agronomy, Horticulture and Plant Science Faculty Publications

Geostatistical methods were used to characterize spatial variability in western ( Diabrotica virgifera virgifera LeConte) and northern ( Diabrotica barberi Smith & Lawrence) corn rootworm adult emergence patterns. Semivariograms were calculated for adult emergence density of corn rootworm populations in fields of continuous corn and rotated (corn/soybean) corn. Adult emergence densities were generally greater for northern corn rootworms than for western corn rootworms. The spatial structures of the adult rootworm emergence were aggregated as described by spherical spatial models for western corn rootworm and exponential models for northern corn rootworm. Range of spatial dependence varied from 180 to 550 m …

Agricultural Water Management In The Missippi Delta Region Of Arkansas, H. Don Scott, James A. Ferguson, Linda Hanson, Todd Fugitt, Earl Smith

AAES Research Reports and Research Bulletins

Agriculture is the largest use of soil and water resources in eastern Arkansas. This bulletin summarized the recent historical use of soil and water by agriculture and the impact of irrigation on yields of rice, soybeans and cotton. The experiments conducted in the field to quantitatively schedule irrigations of crops are summarized. The results show the close relationship between the irrigation of crops and the extraction of water from the Alluvial Aquifer. The implications of this relationaship for the future are discussed.

Phyla Lanceolata (Michx.) Greene, Bob Edgin

Specimens by Name

No abstract provided.

Identification Of A Functional Homolog Of The Yeast Copper Homeostasis Gene Atx1 From Arabidopsis, Edward Himelblau, Helena Mria, Su-Ju Lin, Valeria Cizewski Culotta, Lola Penarrubia, Richard M. Amasino

Biological Sciences

A cDNA clone encoding a homolog of the yeast (Saccharomyces cerevisiae) gene Anti-oxidant 1 (ATX1) has been identified from Arabidopsis. This gene, referred to as Copper CHaperone (CCH), encodes a protein that is 36% identical to the amino acid sequence of ATX1 and has a 48-amino acid extension at the C-terminal end, which is absent from ATX1 homologs identified in animals. ATX1-deficient yeast (atx1) displayed a loss of high-affinity iron uptake. Expression of CCH in the atx1 strain restored high-affinity iron uptake, demonstrating that CCH is a functional homolog of ATX1 …

Study Of The Baie Gene In Bile Acid 7Α-Dehydroxylating Bacteria, Yasemin Kaya

Masters Theses & Specialist Projects

Intestinal bile acid 7α-dehydroxylating bacteria have recently been implicated in cholesterol allstone disease. Eubacterium sp. V.P.I. 12708, a bile acid 7α-dehydroxylating bacterium, contains multiple bile acid inducible (bai) genes which encode the enzymes responsible for bile acid 7a-dehydroxylation. The baiE gene encodes a bile acid dehydratase activity in Eubacterium sp.V.P.I. 12708. Using the polymerase chain reaction assay we determined the presence or absence of baiE-like genes in five clostridial bile-acid 7α-dehydroxylating strains: Clostridium sp. TO-931, Clostridium sp. HD-17, Clostridium sp. TN-271, Clostridium bifermentans 1-55, and Clostridium sordellii ATCC 9714. Results from all the strains tested showed amplification at the predicted …

Kentucky Warbler (Vol. 74, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Santa Clara Magazine, Volume 40 Number 2, August 1998, Santa Clara University

Santa Clara Magazine

8 - THINKING ON THEIR FEET By Tegan McLane. A renowned choreographer coaches SCU dance students to craft bold, new expressions.

12 - MARRIED IN THE MISSION By Tegan McLane. Alumni remember returning to SCU for the most precious - and sometimes the most traumatic- days of their lives.

20 - THE GOOD DEATH By Connie Hinckley. Can physician-assisted suicide provide death with dignity as Oregon voters think?

26 - LET THEM EAT WINDOWS By Susan Vogel. An SCU symposium takes a close look at Microsoft, which grew from a little company that could to an engine geared to outdistance …

The Effect Of Calf Morbidity On Feedlot Performance And Profitability, Jessica Gentry

Masters Theses & Specialist Projects

Two "Value-Added Calf (VAC) Programs were evaluated relative to feedlot performance and profitability. Two hundred seventy-three head of feeder calves were included in this study. Ninety-five Certified: Preconditioned for Health (CPH), ninety KCA Gold Tag and eighty-eight "Sale Barn" cattle were fed at Horton's Research Feedyard in Fort Lupton, Colorado. No background information regarding the health status of the Sale Barn cattle was known. Cattle were purchased in December 1997 and were entered in the Rocky Mountain Ranch-to-Rail program on January 6, 1998. The cattle were checked daily for illness and taken to a hospital pen for treatment if symptoms …

Contribution Of Tobacco To Agriculture Receipts In Four Prominent Tobacco Producing States, Brian Lacefield

Masters Theses & Specialist Projects

Agriculture receipt data were obtained from USDA Agriculture Statistics on four prominent tobacco producing states-North Carolina, Kentucky, Tennessee, and Virginia--for the period of 1946 through 1995. The data were adjusted for inflation according to the Consumer Price Index and averaged for five-year periods beginning with 1946-1950 and continuing through 1991-1995. There were four objectives of the study. The first objective was to compare these states for annual agriculture receipts, crop receipts, and livestock receipts. State total agriculture receipts ranged from 1.8 to 3.2 billion dollars in 1946-50 and from 1.4 to 4.1 billion dollars in 1991-95. For total agriculture receipt, …

Pair Interactions In Red-Faced Warblers, P. M. Barber, Thomas E. Martin, K. G. Smith

Wildlife Biology Faculty Publications

Forty pairs of breeding Red-faced Warblers (Cardellina rubrifrons) were observed in 1992 and 1993 on the Mogollon Rim, Arizona. Intrusions by extra-pair males, interactions between pair members, and other pair interaction behaviors were recorded. The majority of intrusions occurred during the building stage of the nesting cycle. Males responded to intrusions during nest building by decreasing intra-pair distance. Males maintained shorter intra-pair distances by following the female when she initiated movements and by not initiating pair movements themselves. Intra-pair distances were as short or shorter during the incubation period as during nest building, and were shorter during incubation than during …

Multiple Duplications Of Yeast Hexose Transport Genes In Response To Selection In A Glucose-Limited Environment, Celeste J. Brown, Kristy M. Todd, R. Frank Rosenzweig

Biological Sciences Faculty Publications

When microbes evolve in a nutrient-limited environment, natural selection can be predicted to favor genetic changes that give cells greater access to limiting substrate. We analyzed a population of baker's yeast that underwent 450 generations of glucose-limited growth. Relative to the strain used as the inoculum, the predominant cell type at the end of this experiment sustains growth at significantly lower steady-state glucose concentrations and demonstrates markedly enhanced cell yield per mole glucose, significantly enhanced high-affinity glucose transport, and greater relative fitness in pairwise competition. These changes are correlated with increased levels of mRNA hybridizing to probe generated from the …

Plans For Crash-Tested Bridge Railings For Longitudinal Wood Decks On Low-Volume Roads, Michael A. Ritter, Ronald K. Faller, David B. Bunnell, Paula D. Hilbrich Lee, Barry Thomas Rosson

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

The plans for crashworthy bridge railings for low-volume roads were developed through a cooperative research program involving the USDA Forest Service, Forest Products Laboratory (FPL); the Midwest Roadside Safety Facility, University of Nebraska-Lincoln (MwRSF); and the Forest Service, National Forest System, Engineering. Three railings were developed and successfully tested in accordance with National Cooperative Highway Research Program (NCHRP) Report 350 Test Level-1 requirements. The fourth system was developed for a lower test level based on criteria developed by the Forest Service for single-lane bridges on very low-volume roads. For the convenience of the user, full drawing sets are provided in …

Nebline, August 1998

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Harvesting Everlasting Flowers for Drying
Watering tips
Scorch—curse of plants on the plains
New grass faces the big test
Storing extra seeds
Control of ground ivy in the lawn
Audubon purchases 610-acre O'Brien Ranch
Household hazardous waste collection
Don't get stung!
Allergic to bee stings?
Dealing with unwanted guests
How animals stay cool when it's hot!
Fruit, vegetables and freedom to farm
Prescribed burning of CRP
What is LB1209 and does it affect you?
Toxic plants
How often to pump your septic tank
Caring for animals when gone
Flies
Field Day features high-value crops
Buildings
Festival of Color
Fresh, fabulous …

Ard News August 1998

Agricultural Research Division: News and Annual Reports

CONTENTS:

Comments from the Dean
Additional Opportunities for the ARD Undergraduate Honors Student Research Program
Widaman Trust Distinguished Graduate Assistant Award
Hardin Distinguished Graduate Fellowship for 1998-1999
ARD Advisory Council Election Results
Proposals Submitted for Federal Grants
Grants and Contracts Received June and July, 1998
New or Revised Projects
Nancy Lewis Selected for Leadership Development Program
Additional Guidance Regarding Tuition Remission on USDA-Funded Graduate Research Assistantships
Cooperative State Research, Education and Extension Service Budget for FY 1999
NUPROF Program
Fund for Rural America Update

Comments On ‘‘Air–Sea Gas Transfer: Mechanisms And Parameterization’’, Alexander Soloviev, Peter Schlüssel

Marine & Environmental Sciences Faculty Articles

No abstract provided.

Forage News [1998-08], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Forages at the State Fair
• Late Summer Seeding Tips
• Applying Manure to Forage Crops
• Plan Now for Stockpiled Grass for Fall
• Upcoming Events

A Multicentury Stable Isotope Record From A New Caledonia Coral: Interannual And Decadal Sea Surface Temperature Variability In The Southwest Pacific Since 1657 Ad, Terrence M. Quinn, Thomas J. Crowley, Frederick W. Taylor, Christian Henin, Pascale Joannot, Yvan Join

Marine Science Faculty Publications

A 335 year stable isotope record from a New Caledonia coral (22°S, 166°E) helps fill a large gap in historical climate reconstructions. Although the long‐term coral δ18O‐based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be ∼0.3°C lower than the 20th century average, with interdecadal excursions of 0.5°–0.8°C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Niño band; an inderdecadal spectral peak is present, but its robustness …

Cytoplasmic Assembly And Accumulation Of Human Immunodeficiency Virus Types 1 And 2 In Recombinant Human Colony-Stimulating Factor-1-Treated Human Monocytes: An Ultrastructural Study, Jan Marc Orenstein, Monte S. Meltzer, Terri Phipps, Howard Gendelman

Nebraska Center for Virology: Faculty Publications

Recombinant human colony-stimulating factor-1-treated human peripheral blood-derived monocytes-macrophages are efficient host cells for recovery of the human immunodeficiency virus (HIV) from blood leukocytes of patients with acquired immunodeficiency syndrome. These cells can be maintained as viable monolayers for intervals exceeding 3 months. Infection with HIV resulted in virus-induced cytopathic effects, accompanied by relatively high levels of released progeny virus, followed by a prolonged low-level release of virus from morphologically normal cells. In both acutely and chronically infected monocytes, viral particles were seen budding into and accumulating within cytoplasmic vacuoles. The number of intravacuolar virions far exceeded those associated with the …

Rural Industry Scholarship In Agriculture : Final Report Of The Grains Research & Development Corporation For The Grain Research Committee Of Wa, John Allan

Research Reports

In 1986 the Western Australian Government established an undergraduate scholarship in agricultural science. The scholarship was introduced to attract high calibre students into agricultural science as an alternative to highly rewarded professions such as medicine, law and commerce. The State Wheat Industry Research Committee and Barley Industry Research Committee subsequently provided funding to support the scholarship. In 1992 the Grains Research and Development Corporation agreed to ongoing funding on behalf of the Grains Industry.

A Partial Host Range Of The High Plains Virus Of Corn And Wheat, Dallas L. Seifers, Tom L. Harvey, T. J. Martin, Stanley G. Jensen

Department of Plant Pathology: Faculty Publications

Barley (Hordeum vulgare), cheat (Bromus secalinus), corn (Zea mays), oat (Avena sativa), rye (Secale cereale), and wheat (Triticum aestivum) were infected by a Kansas isolate of the High Plains virus (HPV) in greenhouse experiments, but several other grass species were not. Infection of a host was dependent upon wheat curl mite numbers. Although both green foxtail (Setaria viridis) and yellow foxtail (S. glauca) are found naturally infected by HPV, only yellow foxtail could be infected in greenhouse experiments. Field sampling (1994 to 1996) of …

Molecular Basis For Effects Of Carcinogenic Heavy Metals On Inducible Gene Expression, Joshua W. Hamilton, Ronald C. Kaltreider, Olga V. Bajenova, Michael A. Ihnat, Jennifer Mccaffrey, Bruce W. Turpie, Erin E. Rowell, Jannet Oh, Michael J. Nemeth, Carrie A. Pesce, Jean P. Lariviere

Dartmouth Scholarship

Certain forms of the heavy metals arsenic and chromium are considered human carcinogens, although they are believed to act through very different mechanisms. Chromium(VI) is believed to act as a classic and mutagenic agent, and DNA/chromatin appears to be the principal target for its effects. In contrast, arsenic(III) is considered nongenotoxic, but is able to target specific cellular proteins, principally through sulfhydryl interactions. We had previously shown that various genotoxic chemical carcinogens, including chromium (VI), preferentially altered expression of several inducible genes but had little or no effect on constitutive gene expression. We were therefore interested in whether these carcinogenic …

Optimized Boundary Conditions And Data Assimilation With Application To The M-2 Tide In The Yellow Sea, Igor Shulman, James K. Lewis, Alan F. Blumberg, B. Nicholas Kim

Faculty Publications

An optimization approach is derived for assimilating tidal height information along the open boundaries of a numerical model. The approach is then extended so that similar data along transects inside a model domain can also be optimally assimilated. To test the application of such an optimized methodology, M-2 tidal simulations were conducted with a numerical ocean model of the Yellow Sea, an area with a strong tidal influence. The use of the optimized open boundary conditions and internal data assimilation leads to a significant improvement of the predictive skill of the model. Average errors can be reduced by up to …

The Proportion Of Snail Kites Attempting To Breed And The Number Of Breeding Attempts Per Year In Florida, Robert E. Bennetts, Katie Golden, Victoria J. Dreitz, Wiley M. Kitchens

Wildlife Biology Faculty Publications

During the breeding season of 1995 we monitored the proportion of adult and subadult Snail Kites (Rostrhamus sociabilis) attempting to breed and the number of breeding attempts using radio telemetry. Our sample consisted of 23 adults (14 females, 9 males) and 9 subadults for which we had data over the entire breeding season. All adults attempted to breed at least once with an observed average of 1.4 (± 0.6 SD) breeding attempts per individual. In contrast, only 3 (33%) of the subadults attempted to breed. Of the adults, 15 (65%) made one breeding attempt, 7 (30%) made two …